MURATA POWER SOLUTIONS MTU2S0524MC Datasheet

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MTU2 Series

Isolated 2W Single & Dual Output SM DC/DC Converters

SELECTION GUIDE

FEATURES

Patent Protected

UL 60950 Recognised

Footprint over pins 0.69cm

2

Single & dual isolated output

1kVDC Isolation “Hi Pot Test”

Efficiency up to 85% (Typ.)

MSL Level 1

Power density 3.403W/cm

3

3.3V, 5V, 12V & 24V Input

5V,12V & 24V single & dual outputs

Custom solutions available

Multi-layer ceramic capacitors

PRODUCT OVERVIEW

The MTU2 series is a new range of miniature sur­face mount, high performance 2W DC/DC convert­ers. With a footprint reduction of over 50% from
the previous generations of 2W SMD DC/DC, the
MTU2 series offers 2W of available output power
over a wide temperature range. The MTU2 series
is more efficient and offers improved regulation
performance for applications where a wide output
voltage variation can not be tolerated. The MTU2
series is pin compatible with the MTU2 series.

3

3

Order Code

1

Output

Voltage

Voltage

Nominal Input

VVmA

MTU2S0305MC 3.3 5 400 12.5 15 53 75 740 74 79 15 2650
MTU2S0505MC 5 5 400 9.5 12 47 65 480 78 82 17 2763
MTU2S0524MC 5 24 83 9 11 14 30 460 79 85 18 3060
MTU2S1205MC 12 5 400 7.5 10 40 60 200 72 80 20 2207
MTU2S2405MC 24 5 400 8 10 30 50 100 73 80 21 2314
MTU2D0505MC 5 ±5 ±200 10.5 13 30 55 480 77 82 19 2898
MTU2D0512MC 5 ±12 ±83 8.5 11 15 35 460 79 85 19 2697
MTU2D1212MC 12 ±12 ±83 6.5 8 15 35 190 77 83 24 2452

(Typ.)

Output Current

Load Regulation

% mVp-p

(Max)

Load Regulation

(Typ.)

(Max.)

Ripple & Noise

Ripple & Noise

Full Load

Efficiency (Min.)

Efficiency (Typ.)

Input Current at

mA % % pF kHrs

Isolation

Capacitance

2

MTTF

INPUT CHARACTERISTICS

Parameter Conditions Min. Typ. Max. Units

Continuous operation, 3.3V input types 2.97 3.3 3.63

Voltage range

Reflected ripple current All variants 10 mA p-p

Continuous operation, 5V input types 4.5 5.0 5.5
Continuous operation, 12V input types 10.8 12.0 13.2
Continuous operation, 24V input types 21.6 24 26.4

V

ISOLATION CHARACTERISTICS

Parameter Conditions Min. Typ. Max. Units

Isolation voltage Flash tested for 1 minute 1000 VDC
Resistance Viso= 1000VDC 10 GΩ

OUTPUT CHARACTERISTICS

Parameter Conditions Min. Typ. Max. Units

Rated power TA=-40°C to 85°C 2.0 W

Voltage set point accuracy

Line regulation High V

See tolerance envelope

IN to low VIN

MTU2S0305MC 1.0 1.3
All other variants 1.0 1.2

%/%

GENERAL CHARACTERISTICS

Parameter

Switching frequency

Conditions Min. Typ. Max.

MTU2D0505MC 50

All other variants 70

Units

kHz

The devices are suitable for all applications where
high volume production is envisaged.

For full details go to

www.murata-ps.com/rohs

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ABSOLUTE MAXIMUM RATINGS

Input voltage VIN, MTU2S03 types 5.5V
Input voltage V
Input voltage V
Input voltage V

1. If components are required in tape and reel format suffix order code with -R, e.g. MTU20505MC-R.

2. Calculated using MIL-HDBK-217 FN2 calculation model with nominal input voltage at full load.

3. See ripple & noise characterisation method.
All specifications typical at T

IN, MTU2S05 types 7V
IN, MTU2S12 types 15V
IN, MTU2S24 types 28V

A=25°C, nominal input voltage and rated output current unless otherwise specified.

KDC_MTU2.C02 Page 1 of 9

MTU2 Series

Isolated 2W Single & Dual Output SM DC/DC Converters

TEMPERATURE CHARACTERISTICS

Parameter Conditions Min. Typ. Max. Units

Specification All output types -40 85
Storage -50 125

Case temperature rise above ambient

Cooling Free air convection

1 . Measured after 1 hour continuous operation at nominal VIN full load at the center of each PCB.

1

TECHNICAL NOTES

0305, 1205, 2405 30 45
All other variants

25 35

°C

ISOLATION VOLTAGE

‘Hi Pot Test’, ‘Flash Tested’, ‘Withstand Voltage’, ‘Proof Voltage’, ‘Dielectric Withstand Volt­age’ & ‘Isolation Test Voltage’ are all terms that relate to the same thing, a test voltage,
applied for a specified time, across a component designed to provide electrical isolation,
to verify the integrity of that isolation.

Murata Power Solutions MTU2 series of DC/DC converters are all 100% production tested
at their stated isolation voltage. This is 1kVDC for 1 second.

A question commonly asked is, “What is the continuous voltage that can be applied
across the part in normal operation?”

The MTU2 has been recognized by Underwriters Laboratory for functional insulation, both
input and output should normally be maintained within SELV limits i.e. less than 42.4V
peak, or 60VDC. The isolation test voltage represents a measure of immunity to transient
voltages and the part should never be used as an element of a safety isolation system.
The part could be expected to function correctly with several hundred volts offset applied
continuously across the isolation barrier; but then the circuitry on both sides of the bar­rier must be regarded as operating at an unsafe voltage and further isolation/insulation
systems must form a barrier between these circuits and any user-accessible circuitry
according to safety standard requirements.

REPEATED HIGH-VOLTAGE ISOLATION TESTING

It is well known that repeated high-voltage isolation testing of a barrier component can
actually degrade isolation capability, to a lesser or greater degree depending on materi­als, construction and environment. The MTU2 series has toroidal isolation transformers,
with no additional insulation between primary and secondary windings of enameled
wire. While parts can be expected to withstand several times the stated test voltage,
the isolation capability does depend on the wire insulation. Any material, including this
enamel (typically polyurethane) is susceptible to eventual chemical degradation when
subject to very high applied voltages thus implying that the number of tests should be
strictly limited. We therefore strongly advise against repeated high voltage isolation test­ing, but if it is absolutely required, that the voltage be reduced by 20% from specified
test voltage.

This consideration equally applies to agency recognized parts rated for better than func­tional isolation where the wire enamel insulation is always supplemented by a further
insulation system of physical spacing or barriers.

SAFETY APPROVAL

The MTU2 series has been recognized by Underwriters Laboratory (UL) to UL 60950 for functional insulation to a maximum product PCB temperature of 120°C. Forced air cooling
may be used to maintain this temperature requirement. File number E151252 applies.

The MTU2 Series of converters are not internally fused so to meet the requirements of UL 60950 an anti-surge input line fuse should always be used with ratings as defined below.

MTU2S03xxxC: 1.5A
MTU2S05xxxC: 0.63A
MTU2S12xxxC: 0.3A
MTU2S24xxxC: 0.25A

All fuses should be UL approved and rated to at least the maximum allowable DC input voltage.

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KDC_MTU2.C02 Page 2 of 9

MTU2 Series

Isolated 2W Single & Dual Output SM DC/DC Converters

RoHS COMPLIANCE INFORMATION

This series is compatible with RoHS soldering systems with a peak reflow solder temperature of 245ºC as per J-STD-020D.1.

The pin termination finish on this product series is Matte Tin over Nickel Preplate. The series is backward compatible with Sn/Pb soldering systems.
The series has a Moisture Sensitivity Level (MSL) 1.

Samples of the product series were tested in accordance with the conditioning described for MSL level 1 in IPS/J-STD-020D.1.
The product series passed electrical tests and visual inspection criteria.

For further information, please visit: www.murata-ps.com/rohs

TOLERANCE ENVELOPES

The voltage tolerance envelopes show typical load regulation characteristics for this product series. The tolerance envelope is the maximum output voltage variation due to
changes in output loading and set point accuracy.

MTU2D1212MC, MTU2S2405MC & MTU2D0512MC MTU2D0505MC, MTU2S0505MC & MTU2S1205MC

Output Voltage

13.7%

Output Voltage

8.9%

2.5%

5.7%

10

10.2%

4%

Output Voltage

25 10

Output Load Current (%)

5025 10

Output Load Current (%)

1.5%

-3.9%

75

100

MTU2S0305MC MTU2S0524MC

9.4%

4%

Output Voltage

25 10

Output Load Current (%)

25

Output Load Current (%)

1007550

2.2%

-7.6%

1.8%

-4.4%

7550

50

100

0.4%

-5.1%

10075

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KDC_MTU2.C02 Page 3 of 9

MTU2 Series

Isolated 2W Single & Dual Output SM DC/DC Converters

APPLICATION NOTES

Minimum load

The minimum load to meet datasheet specification is 10% of the full rated load across the specified input voltage range. Lower than 10% minimum loading will result in
an increase in output voltage, which may rise to typically double the specified output voltage if the output load falls to less than 5%.

Capacitive loading and start up

Typical start up times for this series, with a typical input voltage rise time of 2.2µs and output capacitance of 10µF, are shown in the table below. The product
series will start into a capacitance of 47µF with an increased start time, however, the maximum recommended output capacitance is 10µF.

Start-up time

Typical Start-Up Wave Form

µs

MTU2S0305MC 225
MTU2S0505MC 165
MTU2S0524MC 3900
MTU2S1205MC 90
MTU2S2405MC 90
MTU2D0505MC 200
MTU2D0512MC 880
MTU2D1212MC

390

Ripple & Noise Characterisation Method

Ripple and noise measurements are performed with the following test configuration.

C1 1µF X7R m ultilayer ceramic capacitor, voltage rating to be a minimum of 3 times the output voltage of the DC/DC converter

C2

10µF tantalum capacitor, voltage rating to be a minimum of 1.5 times the output voltage of the DC/DC converter with an ESR of less

than 100m at 100 kHz
C3 100nF multilayer ceramic capacitor, general purpose
R1 450 resistor, carbon film, ±1% tolerance
R2 50 BNC termination
T1 3T of the coax cable through a ferrite toroid
RLOAD Resistive load to the maximum power rating of the DC/DC converter. Connections should be made via twisted wires
Measured values are multiplied by 10 to obtain the specified values.

Differential Mode Noise Test Schematic

DC/DC Converter

SUPPLY

+

+

Input Output

-

-

C1 C2 C3 R1 T1

R2

OSCILLOSCOPE

Y INPUT

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R LOAD

KDC_MTU2.C02 Page 4 of 9

APPLICATION NOTES CONTINUED

Output Ripple Reduction

By using the values of inductance and capacitance stated, the output ripple at the
rated load is lowered to 5mV p-p max.

Component selection

Capacitor: It is required that the ESR (Equivalent Series Resistance) should be
as low as possible, ceramic types are recommended. The voltage rating should
be at least twice (except for 15V output), the rated output voltage of the DC/DC
converter.

Inductor: The rated current of the inductor should not be less than that of the
output of the DC/DC converter. At the rated current, the DC resistance of the
inductor should be such that the voltage drop across the inductor is <2% of the
rated voltage of the DC/DC converter. The SRF (Self Resonant Frequency) should
be >20MHz.

L

Power

Source

DC

DC

MTU2 Series

Isolated 2W Single & Dual Output SM DC/DC Converters

MTU2S0305MC 4.7 82472C 11R472C 22
MTU2S0505MC 4.7 82472C 11R472C 22
MTU2S0524MC 47 82473C 11R473C 4.7
MTU2S1205MC 4.7 82472C 11R472C 22
MTU2S2405MC 4.7 82472C 11R472C 10
MTU2D0505MC 4.7 82472C 11R472C 22
MTU2D0512MC 47 82473C 11R473C 4.7
MTU2D1212MC 47 82473C 11R473C 4.7

C

Load

L, µH SMD Through Hole C, µF

Inductor Capacitor

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KDC_MTU2.C02 Page 5 of 9

Isolated 2W Single & Dual Output SM DC/DC Converters

EFFICIENCY VS LOAD

3.3V INPUT 5V INPUT

90

80

70

60

50

40

Efficiency (%)

30

20

10

0

0 102030405060708090100

12V INPUT 24V INPUT

90

80

70

60

50

40

Efficiency (%)

30

20

10

0

0 102030405060708090100

Load (%)

MTU2S1205MC

MTU2D1212MC

Load (%)

MTU2 Series

90

80

70

60

50

40

Efficiency (%)

30

20

10

0

0 102030405060708090100

90

80

70

60

50

40

Efficiency (%)

30

20

10

0

0 102030405060708090100

Load (%)

Load (%)

MTU2D0505MC
MTU2D0512MC
MTU2S0505MC
MTU2S0524MC

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KDC_MTU2.C02 Page 6 of 9

TEMPERATURE DERATING

MTU2 Series

Isolated 2W Single & Dual Output SM DC/DC Converters

MTU2S0305MC MTU2S0505MC

100

95

90

85

80

Load (%)

75

70

65

60

55

45 50 55 60 65 70 75 80 85

Ambient Temperature OC

100

99

98

Load (%)

97

96

95

45 50 55 60 65 70 75 80 85

MTU2S0524MC MTU2S1205MC

100

95

90

Load (%)

85

80

45 50 55 60 65 70 75 80 85

Ambient Temperature OC

100

90

80

70

Load (%)

60

50

40

30

45 50 55 60 65 70 75 80 85

Ambient Temperature OC

Ambient Temperature OC

MTU2S2405MC MTU2D0505MC

100

95

90

85

80

75

70

65

Load (%)

60

55

50

45

40

35

45 50 55 60 65 70 75 80 85

Ambient Temperature OC

100

98

96

Load (%)

94

92

90

45 50 55 60 65 70 75 80 85

MTU2D0512MC MTU2D1212MC

100

80

60

Load (%)

40

20

0

45 50 55 60 65 70 75 80 85

Ambient Temperature OC

100

90

80

Load (%)

70

60

50

45 50 55 60 65 70 75 80 85

Ambient Temperature OC

Ambient Temperature OC

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KDC_MTU2.C02 Page 7 of 9

PACKAGE SPECIFICATIONS

MTU2 Series

Isolated 2W Single & Dual Output SM DC/DC Converters

MECHANICAL DIMENSIONS PIN CONNECTIONS

2.54±0.10 [0.100±0.004]

6

4

5

Single Output Types

Pin Function

1+V
3-V
4 NC
5OV
6+V

1.56 [0.061]

1

8.20 [0.323]

3

5.08±0.10 [0.200±0.004]

8.40±0.45 [0.331±0.018]

Dual Output Types

Pin Function

1+V
3-V
4-V
5OV
6+V

8.50 MAX [0.335]

S

(0.35 [0.014])

0.60 [0.024]

All dimensions in mm (inches) ±0.05mm (0.002”). Controlling dimension is mm. All pins on a 2.54mm (0.100”) pitch. Weight: 0.79g, typ.

0.25 [0.010]

x5 PINS

0.10 [0.004]

1.80±0.20 [0

S

.071±0.008]

SEATING PLANE

1.80±0.20 [0.071±0.008]

IN

IN

OUT

IN

IN

OUT

OUT

RECOMMENDED FOOTPRINT DETAILS

6.50 (0.256)

1.00 (0.039)

2.54 (0.100)

2.54 (0.100)

2.60 (0.102)

TUBE OUTLINE DIMENSIONS

12.25 (0.482) MAX

0.75±0.15 (0.030±0.006)

12.25 (0.482) MAX

Unless otherwise stated all dimensions in mm±0.25mm (inches).
Tube length: 520mm ±2.00

Tube Quantity: 60

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KDC_MTU2.C02 Page 8 of 9

Isolated 2W Single & Dual Output SM DC/DC Converters

TAPE & REEL SPECIFICATIONS

REEL OUTLINE DIMENSIONS TAPE OUTLINE DIMENSIONS

330

(12.99) MAX

100

Ø

(3.94) MIN

+0.10
(0.059

-0.00

2.00±0.1 (0.079)

+0.004

-0.000

)

(AT HUB SECTION)

13.00±0.25

Ø

(0.51±0.009)

1.50

8.70±0.1
(0.343)

MTU2 Series

0.50±0.05 (0.020)

16.00±0.10 (0.630)

DIRECTION OF UNREELING

-0.00 (0.00)

2.00(+0.08)

24.40 (0.96)

REEL PACKAGING DETAILS

TRAILER SECTION

Product Orientation

Pin 1, located nearest to
carrier drive sprocket.

Reel Quantity: 400 pcs.

160 (6.30) MIN

30.40 (1.20) MAX

MTU2S

0505

XWWYY

MTU2S

0505

XWWYY

GOODS

ENCLOSURE

SECTION

4.00±0.1 (0.157)

MTU2S

0505

XWWYY

1.75±0.1
(0.069)

11.50±0.1
(0.453)

24.00±0.30 (0.945±0.012)

CARRIER TAPE START

100 (3.94) MIN

8.50±0.1 (0.335)

9.00±0.1

LEADER SECTION

400 (15.75) MIN

Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.

ISO 9001 and 14001 REGISTERED

www.murata-ps.com/support

This product is subject to the following operating requirements

Life and Safety Critical Application Sales Policy:

and the
Refer to:

Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without
notice. © 2015 Murata Power Solutions, Inc.

http://www.murata-ps.com/requirements/

KDC_MTU2.C02 Page 9 of 9